Hi everybody. I want to know if connecting one foot swicht to multiple keyboards by splitting the cable into three jacks can damage the instruments. I need to do this to change the registrations simultaneusly in the three keyboards (PSR, Pa500, TR) with a single operation. When I press the switch I understand the connectors will be joined, for a second, among them and I'm afraid this could be harmful. Otherwise I should build a mechanism that triggers three switches independently for each instrument.
Thanks in advance.

Victor